Abstract
Purpose
The aim of this article was to explore the hyperaccumulative property from cell membrane permeability, subcellular distribution, and chemical form of Solanum nigrum L. to Cd compared to the nonhyperaccumulator Solanum melongena L. (cultivar name Liaoqie 3) in the same plant family.
Materials and methods
Soil pot culture experiment was conducted, and the cell membrane permeability, subcellular distribution, and chemical forms of Cd in S. nigrum and S. melongena were determined.
Results and discussion
The results showed that the tolerance of S. nigrum to Cd was higher and owned all Cd hyperaccumulator characteristics. The relative electric conductivities in root and leaf were higher of S. nigrum than S. melongena, but the malondialdehyde concentrations in former were roughly lower than that in latter. Cd concentration ratio in cell wall, NaCl extractable form, and HAc (acetic acid) extractive form were higher in root, stem, and leaf of S. nigrum.
Conclusions
Compared to S. melongena, stronger Cd tolerance, higher cell membrane permeability with intact cell membrane, weak Cd forms in subcellular distribution, and relative lower bioactivity speciation may be part reasons of S. nigrum hyperaccumulating Cd.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (31270540, 31070455 and 40971184), the National Science & Technology Pillar Program (2012BAC17B04), Hi-Tech Research and Development Program of China (2012AA06A202), and Natural Science Foundation of Liaoning Province, China (201102224).
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Wei, S., Zeng, X., Wang, S. et al. Hyperaccumulative property of Solanum nigrum L. to Cd explored from cell membrane permeability, subcellular distribution, and chemical form. J Soils Sediments 14, 558–566 (2014). https://doi.org/10.1007/s11368-013-0810-3
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DOI: https://doi.org/10.1007/s11368-013-0810-3